Oil-burner.



G. W. BUSCH.

OIL BURNER.

` APPLIOATION rum snPT.'27,191o.

1,003,700. r Patented Sept. 19, 1911.

WTNESSES.-

AVVENTOR. H

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A TTORNEYS.

UNITED A sTATEs PATENT oEEioE.

GEORGE W. BUSCH. F FLORENCE, MASSACHUSETTS.

Specification of Letters Patent. Application lled September 27, 1910. Serial 584,005.

Patentedsept. 19, 1911.

To all whom it 'may concern:

Be it known that l, Geenen W. lli'sou, a citizen of the United States of America, rcsidiug at Florence,.in the county of lla1npshire and State of Massachusetts, have invented a new and useful Oil-Burner, "of

.which the following' is a specification.

My invention relates to improvements in burners, of the compressed-air type, for

feeding oil to the flames in oil-burning' furnaces for dro forging and analogous purposes` and resides more particularly in the outlet and control therefor `0f the burner, the saine being of certain peculiar construction, as hereinafter set forth.

The objects of my invent-ion.are,'fi1'st, to

provide a burner, of the class above indi' i cated, which iscapable of atoinizing to the weakness,

best advantagiefthe fuel forced therethrough to be'hurned upon leaving'` the same, so that there shall be produced a more uniform heat. from lessl fuel. than is the' case with most if not all other kinds of burners for a similar purpose; second, to do away entirely with the ln'eaker-brick commonly employed. and which. as is well'known, is a source 0 much trouble and is really an element of uncertainty and inefficiency vwherever present, and, third to providey adurable oil burner which is comparatively inexpensive and simple in construction, and enhances combustion so that practically no smoke Iis produced, the fuel all beingr consumed.

.lt follows that the burner must be economical in use, and it is true, furthermore,

that with it combustion is obtained which In order to obtain the best results froma burner of this kind, it is necessary to break .l upor atomize the fuelrto a degress of fineness not easy ot accomplishment heretofore, but.' with" my burner I am able;l to

'handle 8.

atoi'nize the fuelv to-any degree of fineness. Thatl am -able to do this is due to the peculiar construction of the valve which regnlatcsthe escape `of fuel from the burner, and which is a conical stepped valve, that is, it is' provided ivithcxternal annular flanges `or shoulders of diameters which vary in regular r adation. A suitable valve-seat niust, of course, be provided forthe aforesaid' conical stepped valve.

To still fui-ther enhance the atoniiiing process, the inner face of the valve may be sunken, dished, or concaved, so as to present a concave instead of a flat surfaceto the fuel and with such surface or face com- 'incnce the breaking-up process.

Passing now to the consideration in de- 'tail` of the burner illustrated in the first view, it will be observedthat such bur'ner comprises a casing l in which is a e0m.

pressed-airchamber 2, a casing 3 in which is a mixing chamber 4, an oil ti 5, a valve (l. and a valve-stem 7 proviced with a The casing 3 is attached to'the casiupr llandI the chambers in said casings open into each other.

l Y Compressed au' is furnished to the chaniber 2 from any suitable source of supply. Oil is supplied to the chamber 4 from any suitable source by way of the tip 5' which is tapped into the casing 3 and located so as to position its discharge end adjacent to the longitudinal center of said chamber.

The handle 8 is at one end of the valvestem 7 outside ofv the casing 1, and the` valve 6 is at the other end of said valve-stem. The valve-stem 7 is screw-threaded at both terminals and the terminal which carries the handle 8 is tapped into the casing 1, so that as said valve-stem is turned by means of said handle said stein moves longitudinally with the valve 6 to seat or unseat the same according to the directions of rotation and travel of the valve-stem. .The valve terminal of t-he stem 7 is slidingly mounted in a. center block 9 which is supported and adjusted4 lby means of four (more br less) centering screws tappedinto the sides of tliezcasing 3,

two of 'such screws appearing at10-10.

The outer endfof the valve 6' is the lar er and from this end the diameterof said va ve diminishes by regular gradation until the smaller inner end or face isreached.` Said face is (lished at 11 and from its centers.,

hub 12 rejects to receive the valve-stein 7. A plura ity of flanges, shoulders, or steps'il Q Aamiamo elements could not well be effected, asisobvious from the foregoing rexplanation When it is no longer desired to use the burner, the valve 6 is closed, and the oil and air supplies are shut ofi'.v v `70 The dishing 11 may be omitted, as is done in the construction shown in Fig. 3 whereinv encircle the valve 6 on the outside, said steps vbeing by preference abrupt or `approximately at right-angles .to the axis of said valve, with the connecting or riser portions approximately parallel"w ith said axis, ex-

cepting in the case notedwbelow.

The casing 3 terminates at itsfree terminal in valve-seat 14 corresponding on the the inner end or face of the valve 6 is made inside to the valve 6,.that is, said valve-seat plain, such plain face being indicated at18.

10 has steps 15, similar to the steps 13, which i In this view, also, the steps 15 areomtted 75 are adapted to be engaged or contacted with vfrom the valve-seat 14 which hasi a vplain by said steps 13 when said valve is closed. "tapered surface 19. In this case the edges The valve-'seat 14 is left tapering at 16 out` of the steps 13and the part17 are broughtA side of the outermost step 15, and the valve into contact with the surface 19 when the 15 6 has a beveled 'part 17 which coincides with valve is.- closed, there being no valve-seat 80 the part 16, this part 17 being the exception steps for said steps '13 to butt against as in referred to above. These tapering parts 16 the other case. These and other modificaand 17 come together, when the valve 6 is tions that may fairlybe said to fall within closed, as well as the steps 15 and 13, that is" the scope of my claims kare included in myl 20 to say, not only are 'the steps 13 forced in'vention. l i

against the steps 15upon the closing of the The operations of vor the results produced valve, but the part 17 is forced against' the', `by the construction shown in the last View part 16, with. the result that anv absolutely, are -very similar to thoseof or produced by gas-tight joint is formed between the valve1 the construction shown in the rst view, and and the valve-seat-l4. in a measure are as effectual or efficient, 90

In practice, air and oil under pressure are' although in a measure only, since the highadmitted to the chambers 2 and 4, respec'- est `etciency is found in the burner first. tively, to Icome together and mix 'in the shown and described herein. chamber 4, the valve 6is actuated outwardly `What I claim as my invention, and desire a 3o by means of the valve-stem 7 to open-said to secure byi Letters Patent, is` 95 valve to whatever extent is required, and the' 1. The combination, in an oil burner, with -mixed oil and air, which constitute the fuelA a suitable casing having a valve-seat the difor the burner, escape through the valves. ameter of whichincreases from within outseat 14. The fuel is ignited and burns upon ward, of a conical valve arranged in opera-l tea-ving thechamber 4 by way' of the valvetive relation to said valve-seat and provided 100 seat 14, combustion occurring at and beyond with a plurality of concentric steps adapted the free end of the casing 3 and the large to contact with said.' valve-seat when said end of the valve 6. The amount of fuel-fed valve is closed, and`r means to operate said to the flames is increased or decreased by valve. f. l 40 actuating the valve 6 out or in to enlarge 2. The combination, in an oil burner, with 105 asuitable casing having' a valve-seat the diameter of which increases from withiny or make smaller the space between said valve and the valve-seat 14. The valve 6 is illusoutward, of a cdpical concentrically stepped valve 'arranged in operative relationto said trated in its wide-openfposition, a position which it will seldo'ineif ever be made to as-l valve-seat and having a depressed face at its 110 inner end, and means to operate said valve.

sume.` K

3. The combination, in an oil burner, with i The fuel is impellcd forcibly against the "dished `face of the valve 6 where the' breaking-up process begins, -from-that said fuel glances swiftl in a splayed condition against the riser portion of one of the steps 15, from the'latter it is driven against one of the stepiri, then `against the riser portion'of the next outervstep 15, and so on, being buffeted from step to step and reduced to finer and still finer spray at ea'ch'shock of contact until finally the thoroughly atomized-fuel. emerges from around said. valve at the outer orl free open end of the valveseat 14 to be consumed by fire. During thisv 6G process the air and oil become more thoroughly and completely mixed than they are in the chamber 4, whichJ is another .advantage accruing from the peculiar-construction of my burner'. Without the steps 13' at least,

S5 the proper mixing and atomizing of the fuel a suitable casing having a concentrically stepped valve-seat whichis largest at its outer terminal, vof a conical concentrically stepped valve arranged in operative relation to said valve-seat, and means to operate said valve. y

4. The combination, in an oil burner, with a casing having Ta concentrically stepped valve-seat which ies-largest at its ,outer terminal, of a conical concentrically stepped valve arranged in operative relation to saidl valve-seat and havinga depressed face at its inner end, and means'tooperate ,said valve. 125

5. The combination, in aoil burner, with a casing having aMvalve-seat the diameter of which increases from within outward, of a conical valve arranged inoperative relation to said ,valve-seat, said valve being tapered 130 v valve arranged in operative at its outer terminal to fit the corresponding l part, of said seat, and being provided with a plurality of concentric steps adapted to contact lvvith said seat, when said valve is closed, and means to operate said valve.

6. The combination, in an oil burner, with a casing having a tapered and concentrically stepped valve-seat which is largest at its outer terminal, of a tapered and concentrically-stepped valve arranged in operative relatio to said valve-seat, and means to operate said valve. Y

7. An oil burner comprising a mixingchainloer casing having a .valve-seat at one end, the diameter of which vvalve-seat increases from Within outward,l an air-cha1nber casing at the opposite end of said firstmentioncd casing, an oil inlet to the mixingchamloer between the air-chamber and the valve-seat, a conical concentrically stepped relation to said valve-seat and adapted to have its steps which stem extends into contacttherewith when said closed, and a stem for said valve,

through the mixingchamber 'and the air-chamber and is tapped into the air-chamber casing.

brought val vc 1s S. An oil burner comprlsmg an air-champ ber casing, a niixingcha1nber casing having a valve-seat the diameter of which increases from within outwardly, an oil inlet to said last-mentioned casing, a conical concentrically stepped .valve arranged in operative re-4 lation to said valve-Senna valve-stem for said valve, said valve-stem havingr its outer terminal tapped into said first-mentioned casing, a center block for the valve terminal of said stem, and centering screws tappedinto said mixing-chamber casing for said block. i

eadaen vv. BUSCH. Witnesses FfA. CUTTER, A. C; FAIRBANKS. 

